Income Taxes (Tables)

3 Months Ended

Mar. 31, 2018

Entity Information [Line Items]

Schedule of Effective Income Tax Rates

The following table details the effective tax rates for the three months ended March 31, 2018 and 2017.

	Three months ended
	March 31,
	2018	2017
DPL	17.6%	37.9%

THE DAYTON POWER AND LIGHT COMPANY [Member]

Entity Information [Line Items]

Schedule of Effective Income Tax Rates

The following table details the effective tax rates for the three months ended March 31, 2018 and 2017.

	Three months ended
	March 31,
	2018	2017
DP&L	18.7%	32.0%